a new cnn poll shows obama leading romney 51-47%. the presidential candidates are answering our questions online on cbssf.com. they are tackling a different issue every day. today's topic, the urban agenda. how each candidate thinks his plan would help struggling cities. >>> the supreme court is revisiting affirmative action. the justices are hearing a case this could affect student admissions at colleges and universities all across the country. danielle nottingham has the latest. >> reporter: the supreme court is once again deciding whether race should be a factor in college admissions. abigail fisher sued the university of texas claiming she was denied a spot partly because she is white. >> i hope the court rules that a student's race and ethnicity should not be considered when applying to the university of texas. >> reporter: fisher's supporters say there are ways colleges can promote diversity without considering race. texas has a law called the 10% plan. it guarantees admission to all students in the top 10% of their class regar